We present the dynamics and energetics of an Eley–Rideal reaction by which SiH 3 radicals impinging on a H-terminated Si(001)-(2×1) surface during plasma deposition abstract hydrogen atoms from the surface and return to the gas phase as silane molecules. The reactions were observed dur...
We report a direct, statistically significant calculation of the surface reactivity of the SiH 3 radical on hydrogenated amorphous silicon (a-Si:H) using molecular-dynamics simulations of repeated impingement of SiH 3 radicals on growth surfaces of smooth a-Si:H films over the te...
The insertion reactions of silylenoid H 2 SiLiF into X–H bonds (X=CH 3 , SiH 3 , NH 2 , PH 2 , OH, SH and F), H 2 SiLiF+XH→H 3 SiX+LiF, have been theoretically studied using quantum chemistry methods. The structures of reactants, transiti...
Interactions of SiH 3 radicals with surfaces of deuterated amorphous silicon (a-Si:D) and hydrogenated amorphous silicon (a-Si:H) films were studied using attenuated total reflection Fourier transform infrared spectroscopy and molecular-dynamics simulations, respectively. SiH 3 r...
The metal–metal bonds of the title compounds have been investigated with the help of energy decomposition analysis at the DFT/TZ2P level. In good agreement with experiment, computations yield Hg–Hg bond distance in [H 3 SiHg–HgSiH 3 ] of 2.706Å and Zn–Zn bond distance in [(η...
The multiple‐channel reactions SiH3 + SiH3CH3 → products and SiH3 + SiH2(CH3)2 → products are investigated by direct dynamics method. The minimum energy path (MEP) is calculated at the MP2/6‐31+G(d,p) level, and energetic information is further refined by the MC‐QCISD method. The rate const...
Gas-phase clustering reactions of SiH 3 + with SiH 4 and H 2 were studied using a pulsed-electron beam mass spectrometer. The bond dissociation energy of SiH 3 + … SiH 4 was estimated to be ⩾35 kcal/mol and those of SiH 3 + (H 2 ...
Time-resolved luminescence spectra have been measured in NaGdF 4 :Eu 3 + in order to investigate quantum cutting in which two visible photons are emitted for one-photon absorption. In a Gd 3 + -Eu 3 + system, two processes of energy transfer from Gd ...
Gadolinium (Gd 3 + ) in Czochralski-grown lutetium fluoride (LuF 3 ) has been investigated by electron paramagnetic resonance (EPR). Detailed analysis of the EPR angular dependencies reveals that Gd 3 + entered substitutionally for Lu 3 + in monoclinic...
A facile polyol with co-precipitation method was utilized for preparation of GdF3:Eu microspheres (core-MSs) at low temperature. The as-prepared core-MSs were successfully coated with lanthanum fluoride and silica shells to enhance the luminescence and solubility characters of the nanomaterials....
In this paper, we have synthesized erbium and ytterbium codoped sodium gadolinium fluoride (NaGdF4:Yb/Er) nanophosphors (NPs), aiming to extend the solar light harvest of PTB7 from visible into near-infrared. Evidence shows that Yb concentration plays an important role in upconversion, because i...
This work determines the X-ray powder diffraction peak positions for trigonal GdF3 experimentally and using simulation. An oxyfluoride matrix glass-ceramic containing the inorganic compound GdF3 was synthesised by quench casting followed by controlled heat treatment. X-ray diffraction analysis w...
Thermoluminescence (TL) in sintered CaF 2 co-doped with Tb 4 O 7 and Gd 2 O 3 has been investigated for UV and X-ray irradiation. Three TL glow peaks for the CaF 2 :Tb, Gd sample are observed at about 353, 435K (437K: for X-ray) and 523K by heating...
In this study, the properties of pure and GdCl 3 -doped polyvinylidene fluoride (PVDF) films were investigated. X-ray diffraction revealed that the PVDF was composed of mixed α and β phases. Adding GdCl 3 to PVDF decreased the crystallinity of the polymer matrix. At room temper...
Europium-doped lanthanum fluoride (LaF 3 :Eu 3+ ) nanoparticles were synthesized using a solvothermal method, and they were then capped with benzoic acid (BA) ligands to form LaF 3 :Eu 3+ –BA hybrid nanostructures. The LaF 3 :Eu 3+ –BA hybrid nan...
A novel covalently bonded Eu3+-based silica hybrid material was designed and its spectrophotometric anion sensing property was studied. The fluorescent receptor (europium complex) was covalently grafted to the silica matrix via a sol-gel approach. FTIR, UV-vis spectra, scanning electron microsco...
The present article reports the synthesis of three Eu(III) complexes [Eu(BA)3(2-ap)] (1), [Eu(HBA)3(2-ap)] (2) and [Eu(ABA)3(2-ap)] (3) (BA=benzoic acid, HBA=2-hydroxy benzoic acid, ABA=2-amino benzoic acid and 2-ap=2-aminopyridine) carried out in ethanol solution. The complexes were further dop...
Europium borate fluoride, Eu5(BO3)3F, was synthesised as a single‐phase crystalline powder starting from europium oxide, europium fluoride and boron oxide at 1370 K. Eu5(BO3)3F crystallises in the space group Pnma. Optical spectroscopy (emission and absorption) on Eu5(BO3)3F confirms the presen...
We present the results of thermoluminescence and photostimulated luminescence measurements of BaMgF 4 , a ferroelectric material which, when doped with divalent europium, can function as an efficient X-ray storage phosphor. While only a broad and largely structureless peak in the photost...
The fluoride molten salt such as FLiNaK and FLiBe is one of the coolant candidates for the next generation nuclear reactor concepts, for example, the fluoride salt cooled high temperature reactor (FHR). For mitigating corrosion of structural materials in molten fluoride salt, the redox condition...
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View